วรรณรัตน์ ว. Principle and Method of Examination. Journal of Humanities and Social Sciences, Rajapruk University, [S. l.], v. 1, n. 2, p. 1–12, 2015. Disponível em: https://so03.tci-thaijo.org/index.php/rpu/article/view/112334. Acesso em: 16 sep. 2026.